116 



here recorded might not he truly a state of Greeks A. 

 spmifera, with the outer (sarcode) region more conspicuous 

 than usual, and more than one " central capsule" present, 

 and no yellow bodies developed. The tint of colour shown 

 in Greef's drawing as belonging to the outer marginal region 

 is seemingly the same, or nearly so, of that prevalent in the 

 outer sarcode stratum of my own Heterojjhrys Fockii, or in 

 Raphidiophrys viridis, where it is undoubtedly mobile and 

 changeable, and no siliceous " skeleton" or " shell." If 

 Greef's views were correct, then these spicula, contrary to 

 analogy, would not be surrounded by sarcode by Avhich de- 

 posited, but one siliceous structure penetrating and embedded 

 in another. 



It will not be thought out of place to endeavour here to 

 present as brief an epitome as I can of Cienkowski's previous 

 and Greef's later observations on the but recently described 

 rhizopod, Clathrulina elegans (Cienk.), as, doubtless, any 

 fresh views or new points as regards an organism seemingly 

 so comparatively rare, and at the same time offering several 

 interesting considerations with respect to its position and 

 affinities, must be accounted of interest. 



This pretty freshwater form was made the type of a new 

 genus by Cienkowski,^ and as yet has been recorded so far 

 as I know, but by that author himself, from near St. Peters- 

 burg, and from two localities in Germany ; by Haeckel, from 

 near Jena ; by Greef, from near Bonn ; and by myself (since 

 by others) from two or three localities in Ireland, and one in 

 Wales. But I am greatly disposed to tliink its distribution 

 is pretty wide, though always scanty and restricted to isolated 

 spots. I had myself ventured to draw attention to it and to 

 describe it at a meeting of the Natural History Society of 

 Dublin, and that before Cienkowski's paper was published ; 

 but as he brought it forward far more elaborately than I 

 could have hoped to have done, and as my paper could not 

 liave been put into type before the Part of the ' Archiv' con- 

 taining his paper appeared, I gladly waived my nomencla- 

 ture, and withdrew my pnper from publication. Greef is, 

 indeed, quite right that I had the priority of publication, and 

 that the form brought forward by me before our Microscopical 

 Club was indeed truly one and the same thing as Cien- 

 kowski's. On the first occasion, indeed, I overlooked the 

 stipes, or rather did not, indeed, fail to see, but misunderstood 



1 Cienkowski, "Ueber die Claliirulina, cine neue Actinopiiryeu-Gattung," 

 ill 'Arcliiv fur Mikroskopische Analomir,' Bd. iii, 1867, p. 311, t. xviii. 



